Pneumao



ug. 2l, 1923.

W. H. KELLER ET L PNEUMATIC ToorI ooNTRUcTIoN Filed sept. 22, 1919 hun WILLIAM E. KELLER AND! -ALEEET scsrivnEa, `er, saliran- Hs-vE-N, v1'ivifourreau',

AssIeNons me WILLrAr/ H. KELLER, Inc., `o r GesinnnsvEn, `rvicnrera:r v,v A

- CORPORATION OIE' MICHIGAN.

rNEUiaa'rio-Toon consrEt-Iorion.`

' Application'inea september 22, i919. "senti No. eeseeff T0 @Z6 whom t may concern.'

Be it known that we, l/YVILLIAMHV. lAIEIJiER,

a citizen of the UnitedV States, and ALBERT SGHINKEZ, a former subject of the Emperor of Austria, both residingat Grand lrla'ven, in the county ofrOttawa, in vtheStafteof Michigan, have invente'd'certan` new' and useful Improvements yin,V Pneumatic-Tool Constructions, 1 of which the lfollowing is a specification- Y The invention relates to pneumatic hammers and like tools, comprisinga lcylinder with a piston reciprocable therein, a handle, and valve means for'cont'r'olling thepiston; and the object ofthe invention is to provide a tool of the character indicated where in the body of the toch-'the cylinder, the handle and the parts comprising the' valve means, are `advantageously, constructed and arranged, the aim beingto simplify the con.- struction wherebyto facilitate the operation of machining the various partsof the tool as well as to permit of the quick-'and easy assembling of such parts, vthus reducing the cost of manufacture to a minimum. 'ln the accompanying drawings wherein we have illustrated a preferred embodiment of our invention, Figure 1 is a central lon# gitudinal sectional view through aV Vpneu-v matic hammer constructed in accordance withour invention. Fig. 2 is a fragmentary sectional view takenon line r2 2 ofv Figrjl'. F ig. Bris a detachedperspectiveviewof one of the parts of our improved hammer.

he tool comprises generally, a .cylinderl' having va piston 2 'reciprocable@thereinxinto and out of voperative engagement with a-tool 3 mounted in the forward end of theeyle inder. #l designates Vahandle comprising Ya rear or hand portion 5 and a forward disk portion 6, while 7 designates generally valve means adapted to' be clamped between r the l say, kthe cylinder, handle and valve casing torear end of the; cylinder and the 'disk' pori tion of the handle. Y

At its rearend the Vcylinder 1 is provided with an enlarged portion S equal in diame-v ter to that of the disk portion 6 of the handle. The handle is provided with a passageway 9 for pressure fluidwhich is controlled by means of a. valve 10 of usual construction. The passageway 9 in the handle extends into the disk portion 6, its lower end being closed by means of aplug 11 entered in the lower periphery of the disk portion 6.

To accommodatesuch passageway in the Ydisl: portion, the latter is enlarged rea-ri wardly as shown zit-"'12 (FigfQ).

The'valve means comprises a valve blocl;

13 and a pair ofend .plates lland 15, the

valve blockV having aV central bore 1 6 formkinge chamber for avalve memberj'l?. f The opposite endsf of this chamber-are closed Vby the Iend plates 14 and-15,` andthe forward 'platela closes the rear: end'of the cylinder'.

n nysuitable arrangement of 'ports and pas- Y sageways, as forexample, that Ashown incur eopendijng`r application Serial-No,4 v` 331,948,

filed-October 20th, 1919, maybe employed to effectl a reciprocation of the valve'member and hence of the piston2. `Accordi'ngly, it

is "deemed unnecessary` to describe herein the courseof pressure fluid through the toolin the voperation thereof.. j l 'i Y To provide an annularl exhaust chamber around the valve casing formed by thevalve bloc-lrV 13 and end plates 14 and 15, I'providef an annular memberor cli '18`which ispref-- erabivV arranged so thatits outer periphery liesv flush with 4outer periphery of theVv enlarged'rearendS of the cylinderandv with.-v the periphery lof 'the disk -member 6 of the handle., VTothis end the end plateslll and V-15 are'made'of a diametersufficiently4v lessthanthat of the `rearend of the cylinder and the dislrmeinber to accommodate thet'hick ness of the fannular'inember, andthe valve blocl; 'is made 4ofa still; smaller "diameter, said 'valve bloclr being provided with a se-V riesof radial eXhaust'duc'ts19 leading'. from ',the'valve; vchamber to :the annular exhaust chamber. To permit ofthe escape of the.eX-.

hausted air vor pressurefluid'from `.the ex-V haust chamber, the annular member is pro- Vvided Vin ione side with a suitable 'openingV such asa'sl'ot 20.

Toy secure the partsiof the tool, that is to getliei",we provide,epreferably, a pair of bolts e 21' arranged' substantially diametrically opposite each other and on opposite sides of the enlargement 12 of the handle".v VSaid.'

jbolts are entered through openings 22 provided in the handle, thence'thro-ugh openportion S of the cylinder as shown at 26,

Preferably, resilient Washers are 'c ein Y ployed' to lockl the bolts against Working loose. The bolts 2l thus constituteV simple and effective means for firmly clamping the parts together in operative association.Y

It will be seen that We have provided a tool made up oi a small number vof parts, of extreme simplicity, which are so constructedy as to be capable of association in an advantageous and eii'ectiv'e manner. The costo't assembling. is thus reduced to a. minimum, and the parts are oi' such character that they may be produced at avery low costi uW e claim asl our invention:V Y Y 1.13m va pressure-duidactuated tool, the Vcombi'nationfoi:- a cylinder havingits rear endv made otrelatiyeiy large diameter,a handleharing' a lforiyarddiskpcirtiorn a cylin-V drical vaire'casing adapted to be interposed between the re'arend. of 'the cylinder and said 'disk portion, therear end of said'cylinder, casing, Aand disk portion being of substantially the same diameter, andflmeans passing through said disk portion, the valve casing, and into-he rear end of 'thelcylinden v exhaust chamber, andmeans passing through said diskportion', the Valve easing, andlinto the rear end of: the'V cylinder, :tor rigidlyse curing thehandle to the-rear end of the cylin'der vWhile clamping'the valve casing between said disk portion and the;cylinder.;4

3. In a tool of the character described, the combinationoi a cylinder, a handle, al cylin# drical memberadapted to be entered between the handle and cylinder, means on opposite sidesco said c},f'lindrical member betrieen'it and the cylinder and,Y handle respectively Wherel'xy to close the rear end of. the cylinder and to abut the handle, said member and means being' constructed. to provide ay valve chamber havinga vali/*e therein, and bolts entered through the handle,l the cylindrical Vdiameter substantially equal to that of thel rear end of thecylinder, Valve means including a' hollow cylindrical block, a pair of end plates upon'the opposite ends of said block and forming therewith a Valve chamber,

and a valve memberv in said chamber,l andL m'eanspassing through the handle and Valve casing and'l into the cylinder-to clamp them together, said cylinder being' enlarged at its rear 'end to accommodate said means'. E

Y 5. A'pressure-luid'actuated toolfcomprisf ing, inv combinatioma cylinder having a piston operable therein, 'a handle mountedfat thev rear end ol the cylindery and having a Y lorwarfdfdisk portion, 'and valve means"`se curedfbetween said disk portion 'andthe handle and 4said cylinderl including -a cylindri'cal block having acentralbore, endplatcs closing;- said bore to form ava'lye chamber, a

valve member operable in said cl'iamberpand Van annular member 'surrounding the Valve casingl in spaced relation with reference to said block toI iorm an vannular exhaust chamber, saidy block being or" smaller'diameter than said end platesand the end plates'be-v ing ot smaller'diameter,than'the'rear end of said cylindcrpand said diskportion or" the handle. Y l

` 6. A pressure-fluidactuated tool'compris- 1ng", in combination, a cylinder enlarged at tsil'elelld nd'layine piston operable therein, ahandjl'e secured at thel rear end of thedylnder and? harina, a disk portion 'of a diameter 'Substantially' qllll to that, ot c theY rear endl.V oi' thecylinder, and valve means including a Valve/,f blockha'yi'ng. a central Y yalve chamber closed' Vat; its'op'posite ends,

said block 'being ot`"`si1bsta11tia .eter tha the cylinder, andifan" Y Y .nul'aljmemf be'rf fo ,ming With saidv block anY yannular fefi; haust chamberl and mounted i'vith reference to the',I cylinder and disk portion of the handie so thatfits periphery lies VsubstantiailyY flush 'therewitljn ln testimony whereof set our hands. Y.

l WILLIAM l-RKELLER.

ALEERTISCIIINKEZL We have hereunto 

